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Drug Discovery: Overview01:26

Drug Discovery: Overview

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Drug discovery is a multifaceted process involving extensive screening, testing, and optimization of lead compounds to identify potential new drugs for therapeutic use. It combines several approaches, including screening large numbers of natural products, chemical modification of known active molecules, identification of new drug targets, and rational design based on biological mechanisms and drug-receptor structure. These approaches are carried out in both academic research laboratories and...
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Prescription, Nonprescription and Orphan Drugs01:02

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Prescription drugs require a prescription from a medical practitioner and can only be obtained from a pharmacy. They have many applications, including treating pain, anxiety, and hypertension.
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Generic intravenous (IV) drugs are considered bioequivalent to their branded counterparts due to their 100% bioavailability upon administration. However, variations in stability among different drug products can significantly influence their therapeutic performance, even if they are pharmaceutically equivalent.Cefuroxime, a prophylactic antimicrobial, is often used as a single-dose IV injection for patients undergoing coronary artery bypass grafting surgery. A 3 g dose typically provides...
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Combined Effects of Drugs: Synergism01:27

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Synergism is a useful mechanism where combining two or more drugs is more effective than each constituent used alone. Such combinations are also called supra-additive interactions. The drugs collectively enhance the final therapeutic effect by acting on different targets. Another advantage is that the low dose of each constituent drug is sufficient to achieve the desired effect. This helps reduce the duration of therapy and lower the adverse effects of these drugs.
Such synergistic combinations...
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Pharmaceutical Alternatives: Polymorphic Form-Related and Particle Size-Related Therapeutic Nonequivalence01:27

Pharmaceutical Alternatives: Polymorphic Form-Related and Particle Size-Related Therapeutic Nonequivalence

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Changes in polymorphic forms can significantly influence the bioavailability of poorly soluble drugs. Although the FDA defines pharmaceutical equivalence based on having the same active ingredient, dosage form, and route of administration, it does not automatically disqualify products with different polymorphic forms. This means two products with different polymorphs can still be deemed pharmaceutically equivalent. However, polymorphic differences can affect properties like wettability,...
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Chirality in Nature02:30

Chirality in Nature

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Chirality is the most intriguing yet essential facet of nature, governing life’s biochemical processes and precision. It can be observed from a snail shell pattern in a macroscopic world to an amino acid, the minutest building block of life. Most of the snails around the world have right-coiled shells because of the intrinsic chirality in their genes. All the amino acids present in the human body exist in an enantiomerically pure state, except for glycine - the sole achiral amino acid.
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Drug Repurposing Hypothesis Generation Using the "RE:fine Drugs" System
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セレンディピティ、ステロイド、そして科学

Nima Sharifi1

  • 1Desai Sethi Urology Institute, University of Miami Miller School of Medicine, Miami, Florida; Sylvester Comprehensive Cancer Center, University of Miami Miller School of Medicine, Miami, Florida.

The Journal of steroid biochemistry and molecular biology
|February 28, 2026
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まとめ

前立腺がんの進行はアンドロゲンシグナル伝達経路に依存している。特定 のステロイド骨格炭素に焦点を当てたアンドロゲン代謝の発見は、がんが治療に抵抗性になる仕組みを解明する。

科学分野:

  • 内分泌学とがん生物学
  • 前立腺がん進行の分子メカニズム
  • ステロイドホルモン代謝

背景:

  • アンドロゲンシグナル伝達経路は、前立腺がんの進行および正常な生理学的プロセスに不可欠です。
  • テストステロンおよびジヒドロテストステロンなどの強力なアンドロゲンは、アンドロゲン受容体(AR)を活性化します。
  • 治療抵抗性前立腺がんにおけるARの再活性化は、この経路の重要性を強調しています。

研究 の 目的:

  • 著者グループによるアンドロゲン代謝における一連の発見をレビューすること。
  • 偶発的な発見や仮説の洗練を含む、研究結果のメカニズム的な物語を提供すること。
  • ステロイド骨格の3、5、および17位の炭素に特に焦点を当てて、アンドロゲン代謝の重要な要素を明らかにすること。

主な方法:

  • 発表済みおよび未発表の研究のメカニズム的な物語レビュー。
  • 初期の発見に続くデータ駆動型の仮説洗練に焦点を当てる。
  • ステロイド骨格のC3、C5、およびC17位を標的としたステロイド代謝の分析。

主要な成果:

  • 前立腺がん組織における強力なアンドロゲンの再生を伴うステロイド代謝プロセスは、治療抵抗性を駆動します。
  • 非性腺アンドロゲン合成(例:アビラテロンによる)の阻害は生存期間の延長をもたらし、これらのプロセスの役割を確認します。
キーワード:
アンドロゲン酵素代謝前立腺がんステロイド

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  • ステロイド骨格内の特定炭素(C3、C5、C17)の代謝に関する詳細な洞察が明らかにされました。
  • 結論:

    • アンドロゲン代謝は、治療抵抗性前立腺がんの発症において重要な役割を果たしています。
    • これらの代謝経路を理解することは、より効果的な治療戦略を開発するために不可欠です。
    • この研究は、アンドロゲンシグナル伝達、代謝、およびがん進行の間の複雑な相互作用を強調しています。